shakran

Yes because otherwise the lawyer will get the cop on the stand and the cop will claim to have stopped her inside his jurisdiction.

And he may well have, actually - if she was in his jurisdiction when he clocked her, and then it took him until he was outside of his jurisdiction to catch her, it's in all likelihood a legal stop because neighboring departments usually have an agreement that says if a violation happened in the cop's jurisdiction, he can still make the stop even if the car then goes outside of his jurisdiction.

And since she was doing almost 100mph, it wouldn't have taken her terribly long to cross to another jurisdiction.